Device for overcoming dead-centers



(No Model.)

- G. M. OURRBY.

DEVICE FOR OVERGOMI-NG DEAD CENTERS. No. 517,264. Patented Mar. 2'7,.1894.

7401771065 es. InuezT/r.

f/i v NITED CALEB CURREY, OF BAY CITY, MICHIGAN.

DEVICE FOR OVERCOMING DEAD-CENTERS.

SPECIFICATION forming part of Letters Patent No. 517,264, dated March27, 1894. Application filed November 28, 1892. Serial No. 453,436- (Nomodel.)

To all whom it may concern:

Be it known that I, CALEB M. CURREY, a citizen of the United States,residing at Bay City, in the county of Bay and State of Michigan, haveinvented certain new and useful Improvements in Devices for OvercomingDead-Centers,of which the following is a specification, reference beinghad to the accompanying drawing, which shows in elevation my invention.

This invention relates to a device for overcoming dead-centers.

A, represents the frame of the machine, R the drivingwheel, K thecrank,P the treadle, L the connecting rod from crank to treadle, and Othe treadle hearing, all of which are of ordinary and well knownconstruction and arrangement, and are simply shown as a means forcarrying out my invention.

Referring to my invention, the eccentric C, is secured to the crankshaft, a transverse 1ever B, is secured to frame A at G, the oppositeend S, supported by a curved rod D, with a collar at F secured thereto,a coil spring E slid on the lower portion of curved rod D, and the endof the rod inserted through a hole provided in bracket W, secured totreadle P, the lower end of coil spring E, rests on bracket W, andcollar F serves to give coil spring E proper tension to press transverselever B upward, pressing disk J, against eccentric C. Disk J, is setslightly inclined toward the crank shaft Z with the object of the diskpressing one side of the eccentric pressing it off fromthe lowerdead-center; the upper deadcenter is overcome by adjusting coil spring Eat collar F. An auxiliary reflexible spring H is secured to transverselever B, at N, curved, and the lower end resting on bracket, with thepoint sufficiently curved and hooked over the bracket to keep it inposition, for the object of adjusting transverse lever B at ellipticalhole I, and to act with coil spring E, on the treadle at bracket.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination in a mechanical movement of the eccentric placed on thecrank shaft, a transverse lever provided with an elliptical hole I,pivoted to the frame of the machine at G, with a disk pivoted at J, acurved rod secured to the opposite end S, a collar secured to the rod atF, a coil spring slipped on the lower portion, bracket W secured to thetreadle and. having a hole through it, and the lower end of the rod Einserted therein, an auxiliary reflexible curved spring H, secured totransverse lever B, at N, the lower end resting on bracket W, and thepoint curved and hooked over, substantially as set forth.

Dated Bay City, Michigan, November 10,

CALEB M. CURREY. Witnesses:

H. M. GILLETT, I ALFRED B. LENNOX.

